#sys {

min-width:960px;
min-height:300px;
border: 1px solid black;
}
#cabecalho{

	min-height:20px;
	border: 1px solid black;

}
#menu{
	border: 1px solid black;
	min-height:20px;

}

#conteudo{
	border: 1px solid black;

}
#rodape{
	border: 1px solid black;
	min-height:20px;


}
